Just finished an outdoor enclosure for my son's Sulcata tortoise (Crush) based on Tom's design. Crush if about 7.5" wide. Has anyone ever had issues with their tortoise falling off the edge of the ramp and tipping over? The ramp is not very steep at all. Probably about 3-3.5" at the tallest point. The ramp is currently 13.5 inches wide. Also, do I need to put anti-slip tape on the ramp. The ramp is just plywood,